2 The solution of a system of linear equations is (−3, 1). On the coordinate grid below, graph two lines that could be the graphs of the two linear equations in the system. Label one of the lines you graphed and the other line .ab (a) What is the equation of line ? a (b) What is the equation of line ?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?